Vulcanizing device



J. TRAUM.

VULCANIZING DEVICE.

LICATION mm a 1 Patented July 12, 1921.

JOHN TRAUM', or cosHoc'ron, 01110.

VULGANIZING DEVICE.

To all whom it may concern." 1

Be it known that I,'J'0HN TRAUM, a citi' zen of the United States, residing at Coshocton, in the county otCoshocton and State of Ohio, have invented new and useful Improvements i in Vulcanizing Devices.

Theiinvention relates to the construction and vulcanization ofcasings that are used in combination with pneumatic tubes, the said combination being usually referred to as the pneumatic tire. The device is an expansible sectional core, upon which the casingis constructed and vulcanized. Theobject of theinvention is to correct certain faulty conditions that are inevitable when employing a rigid core, and to eliminate the expensive and laborious method adopted in some instances tosecure morefavorable vulcanizing conditions than may be had with a rigid core. 7 a i s I N 0te.-Inthe process of vulcanizing, the pressure thatyis applied to the forming mold that envelops the'casing constructed upona rigid core, necessarily compresses the fabric or cord structure of the casing. this compressionwisthe result of the companion mold parts closing upon the rigid core, the

conditions are favorable for the fabric or q i bled but unexpanded core is identical with the outer circumference ofthe ring, 5,;by

the actionlof the cap screws l, the several cord structure of the casing to become wrinkledvor bunched. w 3 n A method that is producing commendable results, is, the casing, is removed from the rigidcore upon which it isyconstructed, and there is substituted an elastic core by which means the inner part of the casing is subjected to an expansive pressure during the process ofvulcanizingby means ofair pressure within the elastic core. I a q By reasonof the large number of elastic cores required relative to the number of finished; casings produced, and additional labor required, this method adds greatly to-the cost of production. a i

lVith theexpansible sectional core as de scribed in vthis specification I obtain a greater degree of success with less labor and without the expense of providing andrenewingat frequent intervals theelastic cores.

With these ends, in View the invention consists in the novel construction, arrangement and combination of parts, hereinafter of this specification,

a L spring engage the I threaded Specification of IJetters Pat ent. Patented J 111$ 12, 1 921- Application filed Mamas, 1920. Serial No. 364,240., a

described, illustrated in the accompanying the appended claims. s

eferring to the drawingsforming a part Flgure 1 is an end view drawings, and particularlypointedout in of one of the sections formingthe core;-a

section of the ringupon whichthe several sections ofthe core-are mounted; and also a sectional representation of the diameter of thecore. Fig. 2 is a sectional representation of the core andsring on the line A A in Fig. 1, the parts controlling an dloperating the corebeing in their-proper position. Fig.

3 is a perspective view of one oftheexpan-s sive springs. Fig. 4 is aiperspective view of ployed to ture of the casing from being pressed 'within the opening caused by the separation of the core sections when the core is expanded.

clip andisthe novel means emiprevent the fabrlc or cord struc ;To assemble the core, the several sections forming the core are placed about the ring 5, Fig. 2 upon which they areto be mounted.

he cap screws 1 are placed within the openings provided for themin the ring 5, and

spective sections of the core As the nner circumference of the assemsections of the core are. securely mounted uponthe ring 5; The proper alinement {of the core sections is assured by means of lugs and correspondi'ng openings, .6. In this position the core is rigid and may be mounted upon the casing builders stand (for the convenience of the casing builder the expans ion v springs arenot placed in position until the casing is to be vulcanized) and manipuopenings in their relatedin the same manner, and with thfisame security a as an unexpandible score.

- The spring clips, Fig), 3, whichqareof a conformation identical to the section of the diameter of the core at the contacting points 7 several sect1ons,f are made-to encomof the pass v the core a and overlap) a part of each of l the companion sections. r V i i The coreln this state-1s ready to receive the casing. Theoperation of the core when the casingis to be vulcanized as follows:

Referring to Fig. 2 it will be observed that the angle and points of division of the several sections forming the core, are such as will allow the sections to be removed from the finished casing.

vThe pins 3, carried by the ring 5, which engage the slotted them at the points of contact of the several sections, have a freeradial movement, governed by a pin 7, (Fig. 1). The length of the pins 3, is such central opening of the ring 5, are of an equal distance from the circumference of the ring 5, as are the inneror head ends of the cap screws 1, which secure" the core sections to the ring 5; with the cap screws 2, which engage threaded openings in the ring'5, the

"expansion sprlngs 4:, 2LI'6 131VOtZLlly secured to the ring tension. 1 V

The tension of the expansion springs is attained by reason of the ring 5, serving as the fulcrum, the force of the cap screws 2, acting upon the central part ofthe expansion springs 4, the expansive pressure of the springs is broughtto bearevenly upon the cap screws 1, and the pins 8, which en- 5, and are given any desired gage the inner circumferenceof the core.

' In' this position (asTe'preSented in Fig. 2) by reason of the cap screws 1, the several sections of the core are rigidly secured 'to V th ring 5; but, by releasing the cap screws "1 which action does not place additional pressure upon the expansion springs,.but does increase the space between the inner "circumference of the core, and the heads ofthecap screws 1, with the result that the core sections are forced from the 'ring 5, and are supported during the process of'vulcanization of the casing'by'the cap screws 1, and the pins 3, which have for their radial support the expansion springs 1 pivotally secured to the ring 5, by the cap screws 2. When the core-is in its expanded state there is necessarily an opening at the points of separation of the sections forming the core,

as" these points of separation are encompassed by the spring clips, the surface upon which' the casing is' mounted is not broken. I

Itmay be remarked that the spring clips are made of very thin metal and that their V fromfthevulcanized casing, thejexpansion impression upon thefinished casing should be'so shallow as to be only faintly observed.

,To remove the expansible sectional core springs are released, the cap screwsl, are

removed, which will permit the ring'5, to'be removed from within thecore,'thus allow flngthe core sectionstofbe removed inthe usual manner. 7 y y l I described my'invention with out-attempting to set forth all the forms in which' it may be made, or all the modes of openings, provided for. to the ring 'ner periphery of the that their ends within the ,proper manipulation to control the expanjcap screws,

"sion springs, pins,

its use, I declarethat what I claim and desire to secure by Letters Patent is:

'1. In an expansible core the combination with sections of expansion springs adapted to impulse the sections, aicontinuousring, cap screws adapted to secure the sections by engaging and extending through radial openings in the ring, and engaging radial threaded openings in the 1nsections, and by their sive action of the section, lugs and corresponding' recesses in the abutting ends of companion sections adapted to correctly with sections ofexpansion springs adapted acontinuous ring,

to impulse the sections,

pins adapted to engageiandextend through 5 radial openings in the continuous ring co1n cident with the abutting endsof compan- -ionsections and adapted to transmitthe'expansive force of the expansionsprings to the core the inner periphery and at the contacting points of I companion sections, plns carried by the continuous ring adapted to engage slotted recesses in the radial 'pins'and adaptvedto retain and regulate'thernovement' of the pins. within the radial openingsof the continuous ring;

In an expanslble core the combination of a plurality of sections, expansion springs adapted to impulse the sections, a continuous ring, radial threadedopenings centrally located between radialopenings in the con tinuous ring that engage pins and cap' screws respectively that transmit the expansive force of theexpansion springs to the plurality' of sections, openings centrally located in the. flat surface of the said expansion springs thesaid flat surface of which contact with the inner and protruding ends ofv thesaid radial pins and the said radial cap screwsadapted to the said openings and engaging I the said radial threaded openings in the continuous ring to secure the expansion springs and 'to 'provide pressureth'at reacts through'the expanand cap screws, to expand the core sections all as; substantially set forth. o

4:. In an: expansible core the combination of a seriesfof sections, one section having parallel ends, expansion springs adapted to impulse thesections, acontinuousring, cap

screws adapted to secure the expansion ed, to engage slotted and threaded openings by contacting with slotted openings in r screws carried by the-continuous ring adapt respectively in the inner-"periphery ofthe sections th'e'inner and protruding ends of the saidpins andthe'said cap screws'contacting with' the flat surface of the said expansion springs, means by which the core members are alined and their action concontinuous and unbroken surface to the area trolled, and metal strips adapted to conform upon which the casing is mounted when the 10 to a portion of the surface of the core seccore sections are expanded.

tions upon which the casing is to be constructed and vulcanized, the said properly i JOHN TRAUM' conformed metal strips covering the points Witnesses: a of contact of the unexpanded core sections MARY RAMsER,

and being of suitable width to provide a. IRWIN POBTEUS. 

